qml: add recoverable channels warning to OpenChannelDialog

electrum/gui/qml/components/OpenChannelDialog.qml

@@ -39,6 +39,34 @@ ElDialog {
 
                 columns: 4
 
+                InfoTextArea {
+                    Layout.fillWidth: true
+                    Layout.columnSpan: 4
+                    visible: !Daemon.currentWallet.lightningHasDeterministicNodeId
+                    iconStyle: InfoTextArea.IconStyle.Warn
+                    text: Daemon.currentWallet.seedType == 'segwit'
+                        ? [ qsTr('Your channels cannot be recovered from seed, because they were created with an old version of Electrum.'),
+                            qsTr('This means that you must save a backup of your wallet everytime you create a new channel.'),
+                            '\n\n',
+                            qsTr('If you want this wallet to have recoverable channels, you must close your existing channels and restore this wallet from seed.')
+                          ].join(' ')
+                        : [ qsTr('Your channels cannot be recovered from seed.'),
+                            qsTr('This means that you must save a backup of your wallet everytime you create a new channel.'),
+                            '\n\n',
+                            qsTr('If you want to have recoverable channels, you must create a new wallet with an Electrum seed')
+                          ].join(' ')
+                }
+
+                InfoTextArea {
+                    Layout.fillWidth: true
+                    Layout.columnSpan: 4
+                    visible: Daemon.currentWallet.lightningHasDeterministicNodeId && !Config.useRecoverableChannels
+                    iconStyle: InfoTextArea.IconStyle.Warn
+                    text: [ qsTr('You currently have recoverable channels setting disabled.'),
+                            qsTr('This means your channels cannot be recovered from seed.')
+                          ].join(' ')
+                }
+
                 Label {
                     text: qsTr('Node')
                     color: Material.accentColor

electrum/gui/qml/qewallet.py

@@ -360,6 +360,10 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
             return self.wallet.txin_type
         return self.wallet.get_txin_type(self.wallet.dummy_address())
 
+    @pyqtProperty(str, notify=dataChanged)
+    def seedType(self):
+        return self.wallet.db.get('seed_type')
+
     @pyqtProperty(bool, notify=dataChanged)
     def isWatchOnly(self):
         return self.wallet.is_watching_only()
@@ -394,6 +398,10 @@ class QEWallet(AuthMixin, QObject, QtEventListener):
     def lightningNodePubkey(self):
         return self.wallet.lnworker.node_keypair.pubkey.hex() if self.wallet.lnworker else ''
 
+    @pyqtProperty(bool, notify=dataChanged)
+    def lightningHasDeterministicNodeId(self):
+        return self.wallet.lnworker.has_deterministic_node_id() if self.wallet.lnworker else False
+
     @pyqtProperty(str, notify=dataChanged)
     def derivationPrefix(self):
         keystores = self.wallet.get_keystores()